Relaying in Wireless Communication Network
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Integrated access and backhaul (IAB) networks in wireless communication systems face challenges with blockage and error propagation in AP-AP backhaul links, which affect the reliability and throughput of the network.
Innovation Solution
A node in the wireless communication system is adapted to communicate with other nodes using signal relaying that employs decoding and encoding, and in cases of backhaul channel blockage, instructs second-type nodes to communicate directly with an overhearing first-type node via an access channel, using adapted transmission rates and beamforming to maintain reliability and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If millimeter wave-based wireless backhaul links are used to support high-rate small cell networks, then data rate and bandwidth are improved, but the system becomes highly sensitive to blockage and error propagation occurs
Solution Approach 1:
The patent implements dynamic path selection where the network dynamically switches between relay paths and direct access paths based on real-time channel conditions. When blockage is detected in the backhaul link, the system dynamically reroutes traffic through alternative APs or switches to direct device-to-network connections, maintaining high data rates while adapting to changing reliability conditions
Solution Approach 2:
The system changes operational parameters by switching between different transmission modes (relay mode vs. direct access mode) and adjusting modulation and coding schemes based on detected blockage conditions. This allows the system to maintain optimal data rates by adapting parameters to current channel quality, preventing error propagation when blockage occurs
2Productivity
If narrow beams at millimeter wave bandwidths with strong line-of-sight signal components are used to support high rates, then data rate is improved, but blockage significantly affects system performance
Solution Approach 1:
The patent introduces intermediate relay nodes (other access points in the network) that act as mediators when direct line-of-sight paths are blocked. Instead of relying solely on direct narrow beams between the device and serving AP, the system routes signals through intermediate APs that can provide alternative paths, reducing the impact of blockage while maintaining high data rates through coordinated multi-point transmission
3Area of stationary object
If multi-hop network configuration is used to extend network coverage, then network coverage is improved, but error propagates and outage occurs for all APs in successive hops
Solution Approach 1:
The patent segments the multi-hop transmission path into independent parallel paths through multiple access points. Instead of a single sequential relay chain where errors propagate, the system divides traffic into multiple segments that can be transmitted through different APs simultaneously. This segmentation isolates errors to individual segments, preventing cascade failures across the entire network while maintaining extended coverage
4Productivity
If access and backhaul links share the same radio resources pool, then spectrum efficiency is improved, but access and backhaul links compete over radio resources
Solution Approach 1:
The patent implements dynamic resource allocation where the system dynamically assigns radio resources between access links and backhaul links based on real-time traffic demands and channel conditions. This dynamic scheduling allows the network to maintain high spectrum efficiency by utilizing available resources flexibly while preventing resource competition from degrading reliability, as the system can prioritize critical transmissions and allocate resources adaptively
Data Source
AI summary
The present disclosure relates to a first type node (AP3) in a wireless communication system (1), wherein the first type node (AP3) is adapted to: —communicate with at least one other first type node (AP2) in the wireless communication system (1) over a corresponding backhaul channel (H32) by means of one of at least one type of signal relaying that employs decoding and encoding, and —communicate with a corresponding group of second type nodes (U31, U32) via a corresponding access channel (h31, h32), each group of second type nodes (U31, U32) comprising at least one second type node (U31, U32). In the case of a backhaul channel (H′32) between the first type node (AP3) and one other first type node (AP2) being determined to be blocked to a certain degree, the first type node (AP3) is further adapted to instruct at least one second type node (U31) of the second type nodes in the group of second type nodes (U31, U32) that is comprised in an over-heard sub-group, to communicate directly with an overhearing first type node (AP1) via a corresponding access channel (h31-1).